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Thoughts about the electrophilic aromatic substitution mechanism: the Friedel-crafts alkylation and acylation of benzene with acetyl and t-butyl cations in the gas phase. Struct Chem 2017. [DOI: 10.1007/s11224-017-0915-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Caveng P, Zollinger H. Magnetische Kernresonanz-Untersuchungen über die Struktur der Komplexe aus Nitroaromaten mit aromatischen aminen 10. Mitteilung über nucleophile aromatische Substitutionsreaktionen [1]. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19670500314] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Koch W, Zollinger H. Experimentelle Beiträge zum MILLS-NIXON-Effekt I: Magnetische Kernresonanzspektren von 5-Hydroxyindan und 6-Hydroxytetralin 17. Mitteilung zur Kenntnis der Azokupplungsreaktion [1]. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19650480738] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Caveng P, Fischer PB, Heilbronner E, Miller AL, Zollinger H. Magnetische Kernresonanz- und «Molecular Orbital»- untersuchungen über die struktur von MEISENHEIMER-komplexen 8. Mitteilung über nucleophile aromatische Substitutionsreaktionen [1]. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19670500312] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Christen M, Zollinger H. Bromierung von 2-Naphtol-6,8-disulfosäure: I. Kinetik der Reaktionen mit Br2und HOBr. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19620450643] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Christen M, Zollinger H. Bromierung von 2-Naphtol-6,8-disulfosäure: II. Kinetische Wasserstoffisotopenffekte und Reaktionsmechanismus. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19620450644] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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El-Dusouqui OME, Mahmud KAM, Sulfab Y. Role of structure, medium and pathway in electrophilic aromatic substitutions. Part 2. Incidence of π-complexes and influence of medium on stability of incipient moieties in molecular chlorination of aromatic hydrocarbons. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p29910001167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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El-Dusouqui OM, Mahmud KA, Sulfab Y. π-Complex formation and collapse in electrophilic halogenation of aromatic substrates. Tetrahedron Lett 1987. [DOI: 10.1016/s0040-4039(00)96140-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yatsimirsky A, Ryabov A, Berezin I. Olefin π-complex formation and kinetics of oxidative dimerisation in the palladium(II) acetate system. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0304-5102(78)80007-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Bernasconi CF, Iijima T, Koch W, Wakae M, Zollinger H. Gleichgewichte der Protonenaddition an 1, 1-Bis-(4?, 4?-dimethylaminophenyl)-�thylen in Methanol und in Dimethylsulfoxid. Helv Chim Acta 1973. [DOI: 10.1002/hlca.19730560750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Rys P, Skrabal P, Zollinger H. Struktur und Stereochemie von Übergangszuständen und Zwischenprodukten heterolytischer aromatischer Substitutionen. Angew Chem Int Ed Engl 1972. [DOI: 10.1002/ange.19720841903] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Rys P, Skrabal P, Zollinger H. Structure and Stereochemistry of the Transition States and Intermediates of Heterolytic Aromatic Substitutions. ACTA ACUST UNITED AC 1972. [DOI: 10.1002/anie.197208741] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Jermini C, Koller S, Zollinger H. Allgemeine Basenkatalyse der Azokupplung vono-Diazophenolen. 19. Mitteilung zur Kenntnis der Azokupplungsreaktion. Helv Chim Acta 1970. [DOI: 10.1002/hlca.19700530108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Snyckers F, Zollinger H. Stereochemistry of the ?-Complex Intermediate in Sterically Hindered Electrophilic Aromatic Substitutions. (20th communication on diazo coupling reactions). Helv Chim Acta 1970. [DOI: 10.1002/hlca.19700530606] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Abstract
The bromodeprotonation of sodium p-methoxybenzenesulfonate is an ordinary halogenation reaction in which a hydrogen ortho to the methoxy group is replaced by bromine. The kinetic data for this reaction do not distinguish between a one- and a two-step mechanism with Br2 as the brominating species. The two-step mechanism was confirmed by the observation of a variation in the kinetic hydrogen isotope effect, kH/kD, with changing bromide ion concentration. The observed isotope effects are 1.01, 1.07, 1.18, and 1.31 at bromide ion concentrations 0, 0.5, 1, and 2 M, respectively.The isotope effect study strongly establishes that in this reaction the small depression in rate produced by bromide ion, beyond that due to Br3− formation, arises mainly from a salt effect, and only a small amount of this depression is caused by return of the intermediate to reactants.
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Kreienbühl P, Zollinger H. Nitrierung von pentamethylbenzol in tetramethylensulfon: Eine desaktivierende wirkung von methylgruppen bei einer elektrophilen aromatischen substitution. Tetrahedron Lett 1965. [DOI: 10.1016/s0040-4039(00)90119-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Koch W, Zollinger H. NMR.-Spektren von Zwischenprodukten elektrophiler aromatischer Substitutionen und Elektronen-Donator-Acceptor-Komplexen. Helv Chim Acta 1965. [DOI: 10.1002/hlca.19650480313] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zollinger H. Hydrogen Isotope Effects in Aromatic Substitution Reactions. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 1964. [DOI: 10.1016/s0065-3160(08)60290-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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21
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Zollinger H. Über die Struktur des Zwischenproduktes in elektrophilen aromatischen Substitutionen. Angew Chem Int Ed Engl 1963. [DOI: 10.1002/ange.19630751632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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